Amplifier for radio transmitter having controllable output power.

摘要

A power amplifier is provided for a radio transmitter, such as a cellular radio base station. The output power is measured for calibration and control and different power level control settings are calibrated by a two-stage method of measurement of the output power with and without attenuation in an accurate attenuator. By this means, a wide adjustment of output power is possible over a narrow range of measured power.